公开(公告)号：US11692632B2

公开(公告)日：2023-07-04

申请号：US17134688

申请日：2020-12-28

Applicant: ABB Schweiz AG

Inventor： Kari Heikfolk ,  Christian Vägar

IPC: F16J15/447 ,  F16J15/00 ,  F16J15/3208

CPC classification number: F16J15/4476 ,  F16J15/002 ,  F16J15/3208 ,  F16J15/447

Abstract: A sealing arrangement for an electric machine, which is between a first part attached to a rotatable shaft and a second part immobile with respect to a stator of the electric machine includes a plurality of zig-zag sections of a channel of a labyrinth seal in a radial direction of the electric machine. The channel of the labyrinth seal includes a second seal which is fixedly attached to the first part and which has an elastic material part, the second seal is pressed in the radial direction against a surface of the second part, a normal of which has a component parallel to the radial direction, at rotational speeds a centrifugal force of which to the second seal is weaker than a spring force of the second seal, and the second seal opening a gap between the second seal and said surface at rotational speeds the centrifugal force of which to the second seal is greater than the spring force of the second seal.

公开(公告)号：US20210116035A1

公开(公告)日：2021-04-22

申请号：US17134688

申请日：2020-12-28

Applicant: ABB Schweiz AG

Inventor： Kari Heikfolk ,  Christian Vägar

IPC: F16J15/447

Abstract: A sealing arrangement for an electric machine, which is between a first part attached to a rotatable shaft and a second part immobile with respect to a stator of the electric machine includes a plurality of zig-zag sections of a channel of a labyrinth seal in a radial direction of the electric machine. The channel of the labyrinth seal includes a second seal which is fixedly attached to the first part and which has an elastic material part, the second seal is pressed in the radial direction against a surface of the second part, a normal of which has a component parallel to the radial direction, at rotational speeds a centrifugal force of which to the second seal is weaker than a spring force of the second seal, and the second seal opening a gap between the second seal and said surface at rotational speeds the centrifugal force of which to the second seal is greater than the spring force of the second seal.